Recently we started hearing a whining noise that is intermittent. Happens when driving, when idling, when braking, when turning but not all the time doing those things. It's getting more frequent and seems to be located more "mid car" if that's possible. What's wierd is that it's so hit or miss - sometimes we hear it a lot, sometimes not at all, but more frequently lately. Almost sounds like a fan or a slight grinding yet we can't pinpoint what on earth it's related to - anyone else had this problem?